com.xu.base.Demo09

package com.xu.base;

public class Demo09 {
    //修饰符，不存在先后顺序  如：static、public
    static final double PI=3.14;

    public static void main(String[] args) {
        System.out.println(PI);//3.14

    }
}

\Desktop\JavaSE\out\production\基础语法" com.xu.base.Demo09
3.14

Process finished with exit code 0